This is a Tempest clone, but with some unique differences. It was originally planned to be 1 of 3 "3-D" games on Power-Play Arcade cart #1. A screenshot was shown in a catalog for Amiga's Power System, but no description was included. It was programmed by Dan McElroy and Jerry Lawson implemented the use of 3-D. The game appears to be complete.
(More information about the "Power Play Arcade" series on atariprotos.com.)